1979 Evinrude 4 HP Outboards Service Manual, PN 5424, Page 39Get this manual
POWER PACK OUTPUT TEST aSeparate the three wire connector between the power pack and ignition coils bInsert jumper between the "C" terminals of both three wire connectorsSee Figure 4-23cConnect the neon tester blue lead to clean engine grounddConnect jumper wire to the neon tester black lead, and insert the jumper wire to terminal "B" in the power pack end of the connectorSee Figure 4-23eSet the neon tester switch to position number 1fWhile holding load button "A" depressedcrank engine with the starter ropeand observe the light in the neon tester gReverse the jumper wires between terminals "8" and "C" in the power pack end of the connectorSee Figure 4-23hWhile holding load button "A" depressed, crank engine with the starter rope and observe the light in the neon testerIf neon light flashes on each output test, the power pack is good Check the ignition coilsIf the neon light does not flash, or flashes on only one output test, replace the power pack, and repeat the power pack output testPower Pack CD2 can be substituted with known good pack(Be sure power pack ground lead is securely grounded to the powerhead and ohmmeter checks of sensor coil and charge coil have been done first